Abstract: A device and methods to measure the wheel alignment, to measure the position and orientation of the wheels in relation to the chassis, to measure the chassis and body and to measure parameters of vehicles for problem diagnosis. A beam of colliminated light is directed along a latitudinal reference line. The angle and distance relationship of the wheels to this line are measured. A light beam perpendicular to the latitudinal reference light beam is directed longitudinal to the vehicle. The latitudinal light beam and the longitudinal light beams form a rectangular grid system from which the position of vehicle chassis parts can be measured. A method to calculate and compensate for the errors in the measurement system is used with gravity sensors to more accurately calculate toe, camber and tilt. These angular relations provide toe relative the chassis, camber, caster, s.a.i. and included angle. Also, offset and setback of the front and rear wheels relative to the chassis are provided.